REV. 0
Information furnished by Analog Devices is believed to be accurate and
reliable. However, no responsibility is assumed by Analog Devices for its
use, nor for any infringements of patents or other rights of third parties
which may result from its use. No license is granted by implication or
otherwise under any patent or patent rights of Analog Devices.
a
AD9804
One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.
Tel: 781/329-4700 www.analog.com
Fax: 781/326-8703 © Analog Devices, Inc., 2000
Complete 10-Bit 18 MSPS
CCD Signal Processor
FUNCTIONAL BLOCK DIAGRAM
6dB TO 40dB
10
SDATASCKSL
VGA
VGA GAIN
REGISTER
DATACLKSHDSHP
BANDGAP
REFERENCE
INTERNAL
TIMING
INTERNAL
BIAS
DOUT
VR
T
VRB
DVDD
DVSS
DRVDD
DRVSS
CML
CLPOB
10
CLP
10-BIT
ADC
DIGITAL
INTERFACE
AVDDPBLK
CDS
AD9804
CLP
AVSS
CLPDM
CCDIN
FEATURES
18 MSPS Correlated Double Sampler (CDS)
6 dB to 40 dB 10-Bit Variable Gain Amplifier (VGA)
Low Noise Clamp Circuits
Preblanking Function
10-Bit 18 MSPS A/D Converter
3-Wire Serial Digital Interface
3 V Single Supply Operation
Low Power CMOS
48-Lead LQFP Package
APPLICATIONS
PC Cameras
Digital Still Cameras
PRODUCT DESCRIPTION
The AD9804 is a complete analog signal processor for CCD
applications. It features an 18 MHz single-channel architecture
designed to sample and condition the outputs of interlaced and
progressive scan area CCD arrays. The AD9804’s signal chain
consists of an input clamp, correlated double sampler (CDS),
digitally controlled VGA, black level clamp, and a 10-bit A/D
converter. The internal VGA gain register is programmed through
a 3-wire serial digital interface.